Single window controller



FIG. 1 is a perspective view of a single window controller showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a front elevational view thereof, the rear elevational view being a mirror image. 

The ornamental design for single window controller, as shown and described. 